Electrons and the Periodic Table — Unit test

Question 1

The elements of which group are nonreactive?

Revolt · Accepted Answer

noble gases

Question 2

Jaime calculates the density of a slab of aluminum (Al) metal. What information does Jaime need to evaluate the accuracy of his calculation?

Revolt · Accepted Answer

the accepted value for the density of aluminum

Question 3

Which element is classified as an alkali metal?

Revolt · Accepted Answer

Rb

Question 4

Which best explains why ionization energy tends to decrease from the top to the bottom of a group?

Revolt · Accepted Answer

Electrons get farther from the nucleus.

Question 5

Who was the first to propose the existence of atoms?

Revolt · Accepted Answer

Democritus

Electrons and the Periodic Table — Unit test Answers